PDF malware analysis — malicious · 431e0266c214fe39

MALICIOUS

PDF

81.1 KB Created: 2021-03-17 23:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 8a886882715384309349c44785ede5f7 SHA-1: df61d76a2af2bca8c3c444009bdabb44e4303aa1 SHA-256: 431e0266c214fe393c12cdff14b93e4ce5cfb783f394327d0ff529a31b24d49c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://druttle.ru/wix?keyword=socket+mobile+s700+manual PDF link annotation
- http://xuroriwonufuz.scienceontheweb.net/what_is_a_conceit_a_word_that_appeals_to_the_five_senses.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487647/normal_5fe70f7adf47f.pdfIn PDF document text
- https://cdn.sqhk.co/zuvezunotumu/haLVOif/autoradio_2_din_universal_android_10._1.pdfIn PDF document text
- http://xunopapazugatar.medianewsonline.com/63605495568.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485451/normal_5fe02981b218f.pdfIn PDF document text
- https://cdn.sqhk.co/rufopunuk/jivig5q/16535423896.pdfIn PDF document text
- https://cdn.sqhk.co/jidelugob/Pdsgdgj/41669362478.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404112/normal_6035b5a061fb3.pdfIn PDF document text
- http://nakotigolajeg.scienceontheweb.net/pafiwukotazagawagusasatox.pdfIn PDF document text
- http://gudelew.mywebcommunity.org/business_plan_kenya.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_0f973706055b4995bcbd2fe0d4226770.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/d31d6272-be2a-45d9-b844-1f0edfcb6a7b/libeged.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49bbabe9-c9d9-4cf0-97d5-3184cc14756e/netgear_7550_modem_setup.pdfIn PDF document text
- https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_c63c55cb19b04316b2166d474fae0cc9.pdf?index=trueIn PDF document text
- https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_5523c0edf1624289859081bbb7a4ac42.pdf?index=trueIn PDF document text
- https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_1192800f5e964df987c3f4d96e42deba.pdf?index=trueIn PDF document text
- https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_4d404c62135044e99a01cd70367ecdb4.pdf?index=trueIn PDF document text
- https://help.shopify.comIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e0b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0B2	3044 bytes
SHA-256: `3112424033e8e1a9be6894b0152791b5deaf9643dca8185a84004a7b9addbfcc`
`font_01_sfnt_off0000eb87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB87	5376 bytes
SHA-256: `cf748bd2290504597f17a7a8b054851a437c4d8afda89636ae89259bc961a1bf`
`font_02_sfnt_off0000fdca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDCA	10460 bytes
SHA-256: `9c0a38c216cb1a35e9e1671a3420fad50d6bd4a905a4dcedcd16c265a65dbd33`
`font_03_sfnt_off000121e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121E1	16060 bytes
SHA-256: `503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6`

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